Microsoft will stop releasing security updates for Windows XP on April 8, 2014. Up to a third of organizations are expected to still use Windows XP machines. The average price on the black market for a Windows XP exploit is $50,000 to $150,000 – a relatively low price that reflects Microsofts response, expert Jason Fossen says. After April, only companies paying for custom support will be protected and up to a. third of. organizations are still using Windows XP.”]